First Implementation of Snapped Points

third_party/WebKit/Source/core/dom/Document.cpp

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index ff4bf9a2741cf9bc1748f99e20f21ab33d2da48a..d48ce667413a6042682bee0553b5afb20eb03c7b 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -1944,6 +1944,7 @@ void Document::InheritHtmlAndBodyElementStyles(StyleRecalcChange change) {
     column_gap = overflow_style->ColumnGap();
   }
 
+  ScrollSnapAlign snap_align = overflow_style->GetScrollSnapAlign();
   ScrollSnapType snap_type = overflow_style->GetScrollSnapType();
   const LengthPoint& snap_destination = overflow_style->ScrollSnapDestination();
 
@@ -1958,6 +1959,7 @@ void Document::InheritHtmlAndBodyElementStyles(StyleRecalcChange change) {
       document_style->OverflowX() != overflow_x ||
       document_style->OverflowY() != overflow_y ||
       document_style->ColumnGap() != column_gap ||
+      document_style->GetScrollSnapAlign() != snap_align ||
       document_style->GetScrollSnapType() != snap_type ||
       document_style->ScrollSnapDestination() != snap_destination) {
     RefPtr<ComputedStyle> new_style = ComputedStyle::Clone(*document_style);
@@ -1970,6 +1972,7 @@ void Document::InheritHtmlAndBodyElementStyles(StyleRecalcChange change) {
     new_style->SetOverflowX(overflow_x);
     new_style->SetOverflowY(overflow_y);
     new_style->SetColumnGap(column_gap);
+    new_style->SetScrollSnapAlign(snap_align);
     new_style->SetScrollSnapType(snap_type);
     new_style->SetScrollSnapDestination(snap_destination);
     GetLayoutViewItem().SetStyle(new_style);
@@ -6332,9 +6335,10 @@ bool Document::ThreadedParsingEnabledForTesting() {
 }
 
 SnapCoordinator* Document::GetSnapCoordinator() {
-  if (RuntimeEnabledFeatures::cssScrollSnapPointsEnabled() &&
-      !snap_coordinator_)
+  if (/*RuntimeEnabledFeatures::cssScrollSnapPointsEnabled() &&*/
+      !snap_coordinator_) {
     snap_coordinator_ = SnapCoordinator::Create();
+  }
 
   return snap_coordinator_.Get();
 }